Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Science Task 4 - Year 10 > CW > Flashcards

CW Flashcards

You may prefer our related Brainscape-certified flashcards:
Biology 101 flashcards
1
Q

What is the neutralisation reaction word equation?

A

Acid + base > salt + water

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

How do you recover the salt in neutralisation?

A

Using the evaporation technique. The solution is poured in an evaporating basin, which is heated by a bunsen burner and left to evaporate until salt crystals have been formed.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is an indicator?

A

Indicators can tell whether a substance is an acid or base by changing colour.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What are some examples of indicators?

A

Some common indicators are: universal indicator, litmus, methyl orange.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What does PH stand for?

A

Potential of Hydrogen.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

All matter is…

A

composed of atoms and has mass.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is the rule concerning matter?

A

Matter can neither be created or destroyed in a reaction. The total number of atoms in the reactants = the total number of atoms in the products.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What are compounds?

A

Compounds are new substances that are formed in chemical reactions when atoms rearrange. A compound is two or more elements joined together chemically.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Identify the chemical formula for the compound: Water

A

H2O

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Identify the chemical formula for the compound: Sodium Chloride

A

NaCl

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

When does a neutralisation reaction occur?

A

Neutralisation reactions occur when an acid and a base chemically react with one another to produce a salt and water.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What are some examples of neutralisation reactions in the home.

A
  • Neutralisation of Acids caused by bacteria in your mouth and toothpaste
  • Neutralisation of acids in your stomach and antacid tablets
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

An acid and a metal chemically react to produce what?

A

A salt and a hydrogen gas.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is the general word equation that is used to describe an acid-metal reaction?

A

Acid + Metal ———> salt + hydrogen
An example acid-metal reaction is the pop-test which is achieved by reacting magnesium ribbon (metal) and hydrochloric acid which produces hydrogen (H2): Mg + HCl———> MgCl + H2
(REACTANTS) (PRODUCTS)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Identify the chemical formula for the compound: Citris Acid

A

C6H8O7

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Identify the chemical formula for the compound: Sulfuric Acid

A

H2SO4

17
Q

Identify the chemical formula for the compound: Carbon Hydroxide

A

CH4

18
Q

What happens during a chemical reaction?

A

A chemical reaction is said to have occurred when a new product is formed. Atoms from the original chemicals, also known as reactants are rearranged to form new products in a chemical reaction.

19
Q

What is a chemical equation?

A

A chemical equation is a way of communicating specific information about a reaction. Chemical equations can be written in words or they can be written using molecular formulae Eg. Word equation
Hydrogen + Oxygen —> water
H2 + O —-> H2O

20
Q

What does the arrow in a chemical equation mean?

A

The arrow must be used in chemical equations. It means “produces”

21
Q

What do indicators do?

A

Indicators can tell whether a substance is an acid or base by changing colour.

22
Q

Some common indicators are…

A

Universal Indicator, Litmus, methyl orange.

23
Q

What are reactants and products?

A

Reactants - starting materials/chemicals in a reaction

Products - new chemicals formed by a reaction

24
Q

What is an exothermic reaction?

A

An exothermic reaction is a chemical reaction that releases energy by light or heat.

25
Q

What is an endothermic reaction?

A

An endothermic reaction is a chemical reaction in which the system absorbs energy from its surroundings
eg. Photosynthesis, Melting Ice, Baking Bread, Cooking an Egg

26
Q

Chemical reactions involve energy transfer and can either be…

A

exothermic or endothermic.

27
Q

What is corrosion?

A

The decay (loss of metallic properties in strength, lustre or shine, and electrical conductivity) of a metal that occurs when a metallic substance oxidises after exposure to gases or liquids.

28
Q

What is a chemical equation of corrosion?

A

Fe + O2 > FeO2

Metal + oxygen > metal oxide

29
Q

Ways to prevent corrosion

A
  • Turn to non-corrosive metals such as Aluminium and stainless steel.
  • Keep the area around the metal surface dry.
  • Use drying agents and moisture barrier products.
  • Use corrosive inhibitors (lacquers, painting, grease oil
  • Galvanising (cover the metal with zinc to slow down the corrosive process)
30
Q

THE RATE OF A CHEMICAL REACTION CAN BE CHANGED BY ALTERING THE TEMPERATURE. If the temperature is increased…

A
  • The reactant particles move more quickly - They have more energy - The particles collide more often because of this, and more of the collisions are successful - Thus the rate of reaction increases.
31
Q

THE RATE OF A CHEMICAL REACTION CAN BE CHANGED BY ALTERING THE TEMPERATURE. If the temperature is decreased…

A
  • Molecules are slower - Collide less sometimes you will mix solutions in ice so that the temperature of the system stays cold and the rate of reaction is slower

Science Task 4 - Year 10 (4 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions